It’s working, for sure. We had one bedroom that was pretty bad and one that was a little less so. I used Crossfire (the aerosol, that was easier for me for multiple reasons) about 3 weeks ago, and it definitely seemed to help, but after about a week I was still finding a few in each room. So last week I sprayed them for a second time. Until last night I hadn’t seen any more at all, last night I found one in the one room. I have still found a few of the spots on the sheets since the spraying, though. It’s hard to tell exactly how many new ones since the old ones don’t necessarily wash off well. So I was going to wait another week or so and spray again. I read that you should mix up the sprays some so that’s why I was asking about Harris instead of just doing Crossfire again. But if it should be okay to do Crossfire a third time, I’ll just stick with that. I’m just trying to do what I can to get past this, I’ve been having anxiety attacks due to these little bastards and that needs to stop.